isotactic

[ahy-suh-tak-tik]

i·so·tac·tic

[ahy-suh-tak-tik]
adjective Chemistry.
(of a polymer) having the same configuration at successive, regularly spaced positions along the chain. Compare configuration (def. 5).

Origin:
1950–55; iso- + tactic

i·so·tac·tic·i·ty [ahy-soh-tak-tis-i-tee] , noun
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Isotactic is always a great word to know.
So is addition. Does it mean:
a reaction in which two or more substances combine to form another compound
a colorless, oily, water-soluble, highly toxic, liquid alkaloid, C10H14N2, found in tobacco and valued as an insecticide
Collins
World English Dictionary
isotactic (ˌaɪsəʊˈtæktɪk)
 
adj
chem Compare syndiotactic (of a stereospecific polymer) having identical steric configurations of the groups on each asymmetric carbon atom on the chain

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